Fireproof composition



UNITED STATES PATENT onmcn.

EDMUND G. ROBDVSON, OF MONTCLAIR, NEW J ERSEY, ASSIGNOR T E. I. DU PONT DE DELAWARE.

I No Drawing.

To all whom it may concern: ,v j Be it known that I, EDMUND G. Ronm som;

.' the State of New J ersey, have invented acertain new and useful Improvement in Fireproof Compositions, and do hereby declare l t that the following is afull, clear, and exact description thereof. v My invention relates particularly to comiogpositions designed for coating surfaces with -I films of various kinds, but especially compositions containing cellulose acetate and fire proofing constituents. H I 'nvention is to provide-.,

onipositions fof the above. character rpra-ctice:

thisj-charaoter'which are .especiall cable {fog in coating airplanes. e-er fl rlyt l s of imx'in n. ,7

oprovide compositions of this nature which quidsaredropped upon the coated surfaes fplanes coated thereby from ignitionby a,

, .previ ous eating 'cqmpq t ens-wev dtwi Lstai1'd.'-*-" f this nature which are waterproof, have-a low'resistance to'the air, and which provide I the necessary strength'and after 40 application but without danger of cracking in the case of water of crystallization or co water of constitution, under the influen heat, so as to form a protective blanket thereby to retard combustion and prevent the spread of fire. Another object is to provide fireproofing fA- further as Basia can iaai's Specification of Letters Patent.

Application filetiliebruary25,1918. Serial No.218,99p. U

"of Montclair, in the county of Essex, and in;

contained hereinafter.

hich" lose acetate compositions of the kind hereinv willefi'ectively withstand ignition under the, above referred .to, but among thosewlnch I. 'n'ditions to which theyare subjected'i n acprefer for this purpose are:

her? bject as provide estate M ronn o willfprevent'ignitionof thejairplane surtacesf 'MnPO .11 0: a. i tlilco'atingsf ofsuchcompositions, as forf A x'ample when gasolene or otheninflaimnable As'O .6H O.' I

.eand' ignited'thereoni That is to say; the ob-' this purpose, ifcdesired,'or other salts d t-f i a of myinvention is to provide such coated to give off such protectlve gases orhq-y. i ing compositions which will protect the am ulds.

'larger quantity of burning gasolene on the inaccordance with my invention and which i *coated surfaces than surfaces coated with is particularly adapted for coating the clothv use. a .v I ing composition: Still another object of my invention is to I -7%Hby weight/c ellulose acetate;

NEMOURS AND COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF FIREPROOF COMPOSITION.

Patented July 22, 1919.

uid blanket or absorb heat due to physical or chemical changes therein when heated.

' A further object is to utilize substances'oi this character which have a low solubility in water. 1

Further objects of my invention will appear from the detailed description thereof 7 While my invention is capable of being carried out in many diflerent ways, for the purpose of illustration I shall describe only certain forms of my invention hereinafter. For example, I may use one ofmany dif 6'5 ferent fireproofing constituents for the cellu- Ammonium magnesium Ammonium phosphate,

-; Ammonium magnes um arsenate, M

" Ammonium a Ammonium manganese 'arsenat' MnNH Other ammonium salts use covering airplanes may be the following,- o

'77 by weigh .aminonium agnesiu'nf phos-1 p hate';f 66% by weight acetone, I 20% 'by weight acetaldol."

Again, as a lacquer, I may use the follow by weight cellulose acetate,

5 y weight W phate,

5% by weight of a resin, such as shellac,

' I 5% by weight acetone,

20% by weight acetaldol. v The proportions in the above compositions may be varied within wide limits. For example, the cellulose acetate may vary from substances of this kind which provide a liq- 5 to 10%. However, I prefer to use equal parts of cellulose acetate and ammonium magnesium phosphate. The latter is insoluble in water and when heated gives off ammonia and water of crystallization and water of constitution. The ammonia and water of. crystallization and constitution provide smothering gases. The water acts also as a blanket and absorbs heat due to the physical and chemical change in liberating the water of crystallization and constitution. The liberation of the water of crystallization and tion of the Water thus liberated also results in the absorption of heat.

Any further additional any desired character maybe added sired, to the above compositions.

solvent mixtures may be used, as for exam ple, solvents including eth l a as diluents. For example, I may add theretioned diluents. Also, any proportion of or ivory black, and oil of'cedar or oilof pennyroyal maybe added, if-desired.

I in the above compositions magnesium carbonate or calcium carbonate which give ofl v Furthermore," ammonium phosphate which is ab'o'verrefierred to,when used, not only glVGS' ""hosphoric acid which retar s the fire. While; :1; have" I'described' my invention bdvein}deta il, .Irwish it to be understood ithput' parting from thespirit of the in Jdg n F .A composition "givfisofiafire-smothering gas containing water'vapor.

,A] coating composition containing celacetate anda fire-retarding constituothermg' gas containing water vapor and constitution absorbs heat and the vaporizap tate and a fire-retarding constituent adapted constituents of ariousi methyl acetate and methyl acetone as the solventconstituents, and benzol, toluol andbenzm Y to by weight of any of the above mento' absorbheat due to the physical change '25 pigments and oils, as for example, zinc oxid 1:

In order to provide compositions giving off other protective gases than ammonia, I; 30. may substitute for the ammonium compounds I ca'rbon jdioxid under the infiueme of heat. I

ofifammonia,but provides a'li uid blanket.

that[ -many{changes may be .made therein V ering gas containing ammonia. is

H containing cellulose aceteand a fire-retarding constituent adapted 1 at? dapted whenheated to give off. a fire-' not this patent my be obtained for five cents each, by addressing wuhlnztonfllc.

3. A composition containing cellulose acetate and a fire-retarding constituent adapted to form a fire-smothering blanket.

4. A coating composition containing cel- ,lulose acetate and a fire-retarding constituent adapted when heated to form a firesmothering blanket.

5. A composit' on comprising cellulose acetate and a fire-retarding constituent containing water of crystallization and adapted when heated to give off said water of crystallization.

6. A composition containing cellulose aceto absorb heat due to thechemical change therein when heated. 7.,A coating composition containing cel-' lulose acetate and a fire-retarding constituent adapted when heated to decompose. to form a substance having a large heat-absorbing capacity; 8. p A composition containing cellulose acetate and a'fire-i'etarding constituent adapted therein when heated.

p ,9. A composition containing cellulose acetate and ammonium magnesium phosphate. 10. A coating composition containing eel- 1 lulose acetate and an ammonium metal-phosphatei 11. .A coating composition containing cellulose acetate and a water-insolubleifire-ref tarding constituent adaptedwlienlf to liberate a fire smothering substance. 12. A composition containing, cellulose acetate-and a water-insoluble firefletarding constituent adapted to giveofi a fire smoth eringgas:

1 '13. A "composition. containing cellulose acetate and a water-insoluble fire-retarding constituent adapted to give? off "a tire-smooth 14. A composition containing celluloseacetate and a water-insoluble fire-retardingl constituent adapted to forma fire-smother ing blanket. 1 In testimony that I claim the foregoing I have hereunto set my hand.

" EDMUND G. ROBINSON. Witnesses; p F..HoL 1oN,

the "Commissioner of Patents, 

